Collapsible door.



H. HEDWALL.

COLLAPSIBLE DOOR.

APPLIOATION ULEB DB0. 5, 1908.

Patented May 24, 1910.

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l the strips 6, 6, 6 project into another HENNIG HEDWALL, QUINCY,MASSACHUSETTS.

coLLArsIBLE noon.

Specification of Letters Patent, i Patented ltIay 24, 1910.

.Application led December 5, 1908. Serial No. 466,106.

To all whom, it may concern: i

Be it known that I, HENNLNG HEDWALL,

a subject ofGusta'v V of Sweden, residing at Quincy, 1n the county ofNorfolk and State of Massachusetts, have invented new and usefulImprovements in Collapsible Doors, of which the following is a specification, v

This invention relates to an improvement in collapsible doors, theobject of the invention belng to provide a collapsible door which, whenthe door is open, will collapse inside a pocket or chamber provided inthe interior of. the door casing between the opposite walls thereof andoutside the door The invention consists in the combination andarrangement of parts setforth in the following specication andarticularly pointed out in the claims thereofl.3

. Referring to the drawings: Figure 1 is a front elevation of myimproved door showing the same closed or extended and with a rtion ofthe door casing broken away. ig. 2 is a sectional plan taken on line 2 2of Fig. 1. Fig. 3 is a sectional plan similar to Fig. 2, with the doorremoved.` Fig. 4 isi an enlarged section on line 2 2 of Fig. 1 throughthe casing and the side of the door me, illustrating the Vdoor in itscollapsed position within the casin Like numerals refer to hkeartsthroughout the several views of thev awings.

In the drawin 5 is Athe collapsible door which. consists o a series ofvertical strips 6, 6, 6, one of the by the numeral 6. VThe tops of theside strips l6, 6, 6 project into a groove 7 in the lintel 8. This ve isabout the width of the thickness o said strips. The bottoms of oove91dextending longitudinally of the lt ho 1Q. A

The chamber 11, which is adapted to hold the door 5 when the sane iscollapsed, is inclosed between the casing walls 12 12 and 13 vand oneside of the `frame 14. t the top and bottom ofthe chamber 11 are grooves15' and 16, vres tively. These grooves are duplicates oeach other andthe groove 16 is shown in plan view in Figs.

and 3 consisting of a portion 17 extending 1n the same direction as thedoor 5 when the same is closed and an le portion 18 which extends at anobtuseang e to the rtion 17.

Stop pins 19 and 20 are provi ed in the side strips being indicatedprovidedtop and bottom, respectively, of the side strip 6' and extendlongitudinally therebeyond at the top and bottom-and into the grooves 15and 16, respectively. These stop pins fit loosely in said grooves andwhenthe door is extended or closed, as in Figs. 1 and2, the pins 19and-20 will abut against the right hand ends of the grooves 15 and 16,re Aspectively- Thus said pins, together with the ends of the grooves 15and 16, form sto s to prevent the side strip from being entire ywithdrawn from the chamber 11.

It will be noted that the grooves 15 and 16 are narrower than thegrooves7 and 9, so that when the door is pushed into the chamber theends of the strips are too wide to drop into the groove 16. It will alsobe noted that the grooves 15 and 16 are located above and below thegrooves 7 and 9, respectively.

It will be particularly noted :that the strips 6, 6, 6 and 6 are hinoedtogether'by hinges 21, 21 and 22, 22. T e pivotal pins 21', 21', 21ofthe hinges 21, 2l, 21 andthe pivotal pins 22, 22', 22 of the hinges22, 22, 22 are loca-ted upon opposite sides of the door when the same isextended, the object .of this particular construction-being to insure'the folding of the door in the manner A indicated in Fig. 4.

of any suitable construction attached to the side strip 62. l

The operation of my improved collapsible door ,is as follows: Assumingthe door to be in the position illustrated in Figs. 1 and 2- that is, inits closed or extended position, and'it is desired to open the same andcollapse said door Within the chamber 11, the user pushes the door tothe left from the position illustrated in Figs. 1 and 2 to thatillustrated in Fig. 4. When the door is first pushed toward the left bythe user, the strips of which the' door is composed slide along thegrooves 7 and 9 and the side strip 6 first slides into the chamber 11 tobe folf lowed bythe other strips 6, 6, 6.l The pins of saidslotsadjacent to the side wall 12 of the casing. The following strip 6 pushesthe'side of the strip 6 opposite to that side to which the pins 19 and20 are fastened around and against the side casing wall 13, in theposition shown in Fig. 4, the pins 19 and 20 acting during this lattermovement of the strip 6 as pivots upon which said strip rotates. itspivot 22; the following .strip upon its pivot 21; the next strip uponits pivot 22 and the following strip. upon its pivot 21', as shown inFig. 4. The sixth strip rocks upon its pivot 22 to the angular positionillustrated in Fig. 4' and the seventh str ip rocks upon its pivot 21and also upon its pivot 22 to the angular position illustrated in Fig.4. The side strip 62 has now passed partly within the chamber 11 and thedoor is in its collapsed position.

door or place the same in its extended position, the same is pulled, bymeans ofthe knob 24, toward the right from the position illustrated inFig. 4 u'ntil it assumes the position illustrated in Figs. 1 and 2.

If desired, in heavy doors rollers may be placed upon the door to runupon a suitable track or upon a threshold, and further it will be notedthat in large'and heavy doors with a wide opening the chamber 11 may beduplicated upon the opposite side of lhe door and the doorvdivided inthe middle so that half of the door will collapse Ain a chamber at theright hand side thereof and the other half of the door will collapse ina chamber at the left hand side thereof witho ut departing from thespirit of my invention.

Having thus described my invention, what I claim and desire by LettersPatent `to secure is:

l. In combination, a collapsibledoor consisting of a series of verticalstrips hinged together, at one side thereof adapted to hold said doorwhen the same is collapsed, said frame being provided with a verticalslot through which said members are adapted to pass into and out of saidchamber, a pin fast to one of the side strips of said door, and meansprovided with a groove in which said pin is located, a part of saidgroove leading from a point adjacent to said vertical slot and extendingin the same direction as the plane of said door when extendedv and aVart of said 'groove extending beyondv and aterally with respect to saidfirst part and at an obtuse angle thereto, said strips being disposedtransversely of said first part of said groove when said door iscollapsed.

2. In combination, a collapsible door con sisting of a series ofvertical strips hinged together, a pin fast to one of the side strips ofsaid door and projecting longitudinally therebeyond, and means providedwith a The next strip 6 rotates upon-y To close the tioned groove beinglocated a door frame having a chamber' groove in which said pin islocated, a part of said groove extending in the same direction as theplane of said door when extended and a part of said groove extendingIbeyond.

and laterally with respect to said first part and at an obtuse anglethereto, said strips being disposed transversely of said rst part ofsaid groove when said door is collapsed.

8. In combination, a collapsible door consisting of a series of verticalstrips hinged together, a door frame having a chamber at one sidethereof adapted to hold said door when the same is collapsed andprovided with a groove in the bottom thereof, a threshold provided witha groove, and a stop pin fast to one of the side strips of said door andprojecting downwardly therefrom into 'the first-mentioned groove, thelower ends of said strips being adapted to slide in the second-mentionedgroove,- the second-menabove the firstmentioned groove. l

4. In combination, acollapsible door consisting of a series of verticalstrips hinged together, a door frame having a chamber at one sidethereof adapted to hold said door when the same is collapsed andprovided with a groove vat the bottom thereof, a threshold provided witha groove, and a stop pin fast to one of the side strips of said door andprojecting downwardly therefrom into the first-mentioned groove, thelower ends of said strips being adapted to slide iii thesecond-mentioned groove, the lsecondmentioned groove being wider thanthe firstmentioned groove.

5. In combination, a collapsible door consisting of a series of verticalstrips hinged together, a door frame including a lintel provided with agroove, said frame having a chamber at one side thereof adapted to holdsaid door when the same is collapsed and being rovided at the top andbottom thereof wit grooves, 'a thresholdprovided with a groove, and stoppins projecting upwardly and downwardly from opposite ends,respectively, said grooves in the top and bottom of said chamber, theupper and lower ends of said strips being adapted to slide in saidgrooves4 HENNING HEDWALL.

Witnesses:

LOUIS A. JONES, SADIE V. MCCARTHY.

of one of said side strips into

